The center conditions and isochronous center conditions for a class of quasi-analytic systems were investigated.
研究了一类拟解析系统的中心条件与等时中心条件。
2
The center conditions and isochronous center conditions for a class of quasi - analytic systems were investigated.
研究了一类拟解析系统的中心条件与等时中心条件。
3
A quasianalytic method for solving structural optimization problems is developed by coordinated use of mathematical transformations, high quality approximation and two level approximation strategy.